This post made me realize I had zero visibility into where my Claude Code tokens were actually going, so I built a small companion CLI this morning: https://github.com/vexorkai/claude-trace

It parses ~/.claude/projects/*/*.jsonl and breaks usage down by session, tool, project, and timeline with cost estimates (including cache read/create split).

Context Mode solves output compression really well; this is more of a measurement layer so you can see where the burn is before/after changes.

Disclosure: I built it.